Which layer of the earths atmosphere contains most of the water f the planet

The troposphere

Explanation:

The answer is the troposphere because Most of the water vapor in the atmosphere, along with dust and ash particles, are found in the troposphere explaining why most of Earth's clouds are located in this layer. Temperatures in the troposphere decrease with altitude.

b.

developed countries have tended to improve the environment, while developing countries have tended to damage it.

it is very hard for the climatologists to precisely predict how will the global temperatures be changing so there's lots of models, some of which differ significantly, this is due to multiple factors, and probably the most important is the human activity.

humans have been a key factor in climate change around the globe since the start of the industrial revolution, and in the past few decades the consequences are becoming more obvious. there's lots of emission of pollutants in the atmosphere as well as changing the environment on the surface itself, so it's really hard to predict how will that go in the future because there's some countries that are reducing the damage and are going towards green energy, while others are stubbornly continuing with pollution and damages to the environment.