US is 3 times the size of India so we can't directly compare on the basis of forest cover alone. And forests help as a CO2 sink but they don't do much against other harmful emissions and PM
Stop upvoting stupid posts. Time zones is a perfectly sound way of calculating the current time on anywhere on the planet.
We should just try to improve it by removing skewed concepts like daylight saving and non uniform time zones.
Saying that we need to get rid of the concept of time zones is saying we need to get rid of the metric system.