Embibe Experts Solutions for Chapter: Our Environment, Exercise 1: Exercise

Explain the role of decomposers in an ecosystem.

How does the sun act as a source of energy for all the organisations on earth?

The soya bean aphid is an insect pest of soya bean plants in North America. The aphids can show an exponential growth rate where populations can double in two to three days under favourable conditions. The diagram below shows the growth of soya bean aphids in a field in North America during the growing season.

Suggest why the population of aphids did not increase rapidly until about day 40. 

How can you help in the depleted ozone layer?

What are the impacts caused on the environment by the biodegradable and non-biodegradable wastes that we generate?

Calculate the percentage increase in each of these gases for the time periods $1980-1989, 1990-1999, 2000-2009$ and $2010-2017$.

Compare the concentration of carbon dioxide recorded in $2017$ to the concentration of methane and nitrous oxide in the same year. By what factor do these concentrations differ?

Why is Green Chemistry a benefit to the whole planet rather than simply the countries that have adopted this approach to manufacturing?