Choose the word or phrase that is opposite in meaning to the highlighted part in each of the following sentences

Choose the word or phrase that is OPPOSITE in meaning to the highlighted part in each of the following sentences. 1. Soil pollution leads to lack of fertile land to grow enough food for an increasing population.
Multiple choice 1 Question 3
arid
rich
unclean
deserted
2. One way to protect our environment from pollution is to reduce wasteful consumption.
Multiple choice 2 Question 3
costly
excessive
safe
economical