harmful changes

What Are Useful Changes?

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What Are Useful Changes? Useful changes refer to beneficial changes made by us to activities we do in our daily life. Some of them are: *Turning off electric/electronic appliances when not in use. *Turning off the engine of the vehicle while waiting at a traffic signal. *Recycling old newspapers by converting them into carry bags.

What Are The Changes In The Materials That Are Harmful To The Environment?

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What Are The Changes In The Materials That Are Harmful To The Environment? However, a few of the chemical and physical changes that occur daily are harmful for the environment. This project introduces four physical/chemical changes that are related to the following environmental issues: plastic decomposition, global warming, effects of acid rain, and oil spills.