Which one of the following trees is considered to be an environmental hazard?

The correct answer is (d) Eucalyptus.

Eucalyptus is a fast-growing tree that is native to Australia. It has been introduced to many other parts of the world, including India, where it is considered to be an environmental hazard. Eucalyptus trees have a number of negative impacts on the environment, including:

• They can crowd out native plants and animals.
• They can deplete water supplies.
• They can cause soil erosion.
• They can be a fire hazard.

Babul (acacia nilotica) is a tree that is native to Africa, Asia, and Australia. It is not considered to be an environmental hazard. Amaltas (cassia fistula) is a tree that is native to India and Pakistan. It is not considered to be an environmental hazard. Neem (azadirachta indica) is a tree that is native to India and Pakistan. It is not considered to be an environmental hazard.