What is the role of a plant as a Biotic resource? Write two causes of Global Warming.

Explanation

Plants are acting as producers which are supporting all the life of this planet directly or indirectly. They absorb `CO_2` and release `O_2` during photosynthesis, thus cleaning the environment. `CO_2` is one of the major green house gas contributing to the global warming.
Causes of Global Warming.
1. Deforestation.
2. Increase in level of `CO_2`
3. Increase in pollution.