Read the sentences.
Human beings are responsible for pollution and increasing the levels of pollution. This is happening all over the world. Pollution has many effects.
Without changing their meaning, how should the sentences be combined into one sentence with no unnecessary words?
A. Human beings all over the world are responsible for the effects of increasing pollution.
B. Human beings are responsible, for increasing pollution all over the world, and its effects.
C. Pollution levels are increasing all over the world and human beings are responsible for its effects.
D. Human beings are responsible for increasing the effects of pollution which is happening all over the world.