Global warming will cause.</h2></div>

Read the following about pollution and identify the correct matching combinations.<br> <table class="wysiw…

By the end of the twentieth century what percent of the land of India was covered by forests?

What does the increase in the level of greenhouse gases lead to?

Define Ozone layer.</h2></div>

Name two natural biopesticides.</h2></div>

<p><span>How do you classify the various sources of water pollution?</span></p></h2></d…

How has DDT caused decline in bird population?</h2></div>