As a first step, all air travel less than 800 km should be banned, whether tey are within a country or across a border. The effect of jet aircraft at 40000 ft is about ten times larger than the pollution caused at the surface of earth on roads and power plants. Please see the article Greenhouse Gas Pollution in the Stratosphere Due to Increasing Airplane Traffic, Effects On the Environmentby Mr. Katta G. Murty of univ. of michigan US. We are trying to pass a camel through the eye of the needle. The problem is much bigger than growing more trees and saving water, rain harvesting etc. Take to travel by surface mode preferably, the rail mode which is most efficient of transport of people and material. Wake up.
