2c:null 2d:["$","title",null,{"children":"Emissions of driving vs walking & drinking milk | Durand D'souza | Observable"}] 32:[] 30:{"id":"2d52ddc94867ddcc","slug":"emissions-of-driving-vs-walking-drinking-milk","title":"Emissions of driving vs walking & drinking milk","thumbnail":"cb80f4ef8a0554f4da47a7dbc9815d6a12d96a9a49043ebdd24667fd5c62b1cd","access_level":"public","create_time":"$D2018-07-06T02:27:16.831Z","update_time":"$D2018-07-06T03:34:29.993Z","view_time":null,"first_public_time":"$D2018-07-06T03:25:28.070Z","has_unpublished_edits":null,"fork":false,"stars":1,"starred":false,"owner":{"type":"team","id":"ae2ca073ba69e357","login":"dldx","name":"Durand D'souza","avatar_url":"https://avatars-next.observableusercontent.com/048b460f9c2448fc5185d19429e06ba72c43af9f36152c9741aef7d37570584e","tier":"starter_2024","bio":"Data Scientist @ Carbon Tracker Initiative"},"version":186,"publish_version":186,"role":null,"authored":false,"authors":[{"type":"individual","id":"1c9d62b4508e8ac9","login":"dldx","name":"Durand D'souza","avatar_url":"https://avatars-next.observableusercontent.com/048b460f9c2448fc5185d19429e06ba72c43af9f36152c9741aef7d37570584e","tier":null,"bio":"Data Scientist @ Carbon Tracker Initiative"}],"members":[{"type":"individual","id":"1c9d62b4508e8ac9","login":"dldx","name":"Durand D'souza","avatar_url":"https://avatars-next.observableusercontent.com/048b460f9c2448fc5185d19429e06ba72c43af9f36152c9741aef7d37570584e","tier":null,"role":"editor"}],"comments":[],"custom_thumbnail":false,"trashed":false,"lapsed":null,"subscribed":null,"forks":2,"collection":null,"type":"notebook","body":{"titling":"auto","title":"Emissions of driving vs walking & drinking milk","cells":[{"id":0,"value":"md`# Emissions of driving vs walking & drinking milk\n\nIf you walk ${(walking_distance*5/8).toFixed(1)} miles, you burn ${calories_burned_while_walking.toFixed(0)} calories.\n
\nThis means you need to drink ${(kg_of_milk_to_replace_calories*1000).toFixed(0)} ml of whole milk to replace those lost calories, giving off ${(walking_emissions * 1000).toFixed(0)} g of CO2-equivalent.\n
\n\nIf instead, you drove that same distance, your car would give off ${(driving_emissions*1000).toFixed(0)} g of CO2-equivalent.\n\nTherefore,** ${driving_emissions > walking_emissions ? \"driving 🚗\" : \"walking 🚶\"}** gives off more emissions.\n\nPlay with the figures below to suit your own lifestyle.\n\nWhy make such a silly calculator? To refute the misleading claims in [this NYT article](https://tierneylab.blogs.nytimes.com/2008/02/25/how-virtuous-is-ed-begley-jr).\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":4,"value":"viewof mpg_of_car = slider({min: 0, max: 100, value:30, description: \"Fuel efficiency of car in miles/gallon\"})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":128,"value":"viewof distance_in_miles = slider({min:0, max:100, value: 1.5, description: \"Walking/driving distance in miles\"})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":132,"value":"viewof body_weight = slider({min:40, max: 200, value: 65, description: \"Body weight in kg\"})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":172,"value":"viewof milk_emissions_per_kg = radio({options: [{label: \"Irish grass-fed\", value: 0.837},\n {label:\"UK factory farmed\", value: 0.884},\n {label: \"US factory farmed\", value: 0.898}], \n value: 0.898,\n description: \"Emissions for different dairy systems\"})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":175,"value":"viewof calories_per_kg_milk = radio({options: [{label: \"1% fat\", value: 420},\n {label:\"2% fat\", value:500},\n {label: \"4% fat\", value: 640}], \n value: 640,\n description: \"Type of milk drunk after walk\"})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":135,"value":"md`Everything below this line does not need to be changed\n

`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":14,"value":"walking_distance = distance_in_miles * 8/5 // km","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":16,"value":"walking_speed = 4 // km/h","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":11,"value":"walking_time = walking_distance/walking_speed // hours","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":62,"value":"driving_emissions = (walking_distance*5/8)/mpg_of_car * lb_co2_per_gallon_petrol * 0.454","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":65,"value":"walking_emissions = kg_of_milk_to_replace_calories * milk_emissions_per_kg","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":23,"value":"md`Calories burnt formula from [here](http://www.shapesense.com/fitness-exercise/calculators/walking-calorie-burn-calculator.shtml)`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":6,"value":"calories_burned_while_walking = (0.0215 * walking_speed**3 - 0.1765 * walking_speed**2 + 0.8710 * walking_speed + 1.4577) * body_weight * walking_time","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":28,"value":"md`CO2-equivalent emissions of milk from [here]( http://eprints.nottingham.ac.uk/46395/8/Footprint%201-s2.0-S0022030214000319-main.pdf).`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":75,"value":"kg_of_milk_to_replace_calories = calories_burned_while_walking/calories_per_kg_milk","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":60,"value":"md`Petrol emissions from [here](https://www.eia.gov/tools/faqs/faq.php?id=307&t=11)`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":45,"value":"lb_co2_per_gallon_petrol = 19.6","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":185,"value":"html`CSS Styles\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":101,"value":"import {slider, radio} from \"@jashkenas/inputs\"","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"}],"files":"$W32","stdlib":"1"}} 31:"$30:body"