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Read the passage carefully and answer the questions:

Environmental pollution is the biggest danger faced by our planet, the Earth. This danger is posed because of human activities that harm the natural environment. Some kinds of pollution are visible, for example, a heap of rubbish, black smoke being let out form a truck, etc. There are also other kinds of pollution that are invisible, for example, noise from traffic or machinery. Environment has different components .which are interconnected with one another. One pollutant like pesticides can damage more than one natural system like sea life, trees, crops and others. This can cause the green- house effect or global warming, which happens when the Earth's atmosphere traps the Sun's heat. A few examples of pollutants are untreated sew age, solid waste like plastic and food, industrial waste from sinking oil tankers, pesticides, fuel exhaust from vehicles, indoor pollution and fertilizers. To save the Earth, we all must come forward. Some of the things that you can do to in this regard are, using materials that can be recycled for reuse, like paper and glass, avoiding disposable like plastic containers, using public transport or car pools to reduce car exhaust fumes, etc. Save electricity and water when and where you can, by using them wisely. So do your bit, and save your planet.

The biggest danger that faces our planet is___.

A) Industrial pollution

B) Noise pollution

C) Greenhouse affect

D) All of these

E) None of these