vl.markLine()
.data(forestData)
.encode(
vl.x().field("year").type("temporal").title("Year"),
vl.y().field("value").type("quantitative").title("Forest area (% of land area)"),
vl.color().field("region").type("nominal").title("Region")
)
.width(700)
.height(400)
.title("How Has Forest Area (% of Land) by Region Changed From 1990 to 2022?")
.render()