Trash cans are crucial_______keeping the city clean. Fill in the blanks with the correct preposition.

I don't see why you should buy a dog when you can ______ a homeless one from the animal shelter (roam, estimate, adopt, topic, leading, burn)

Farmers use ______to help their crops grow more quickly.(fertilizers, features, pesticides, resources, waste, topic, leading)

"UNICEF" is an organization trying to fight _______in underdeveloped countries by helping underfed children (homelessness, overpopulation, water shortages, climate change, famine, child labour)

In some countries ___________is legal and there are boys and girls who go to work at the age of six(homelessness, overpopulation, water shortages, climate change, famine, child labour)

People must do a better job of recycling at home. We produce far too much household ____(fertilizers, features, pesticides, resources, waste, topic, leading)

One of the unique ______of the websites is that it allows you to see tigers in their natural habitat through a webcam(fertilizers, features, pesticides, resources, waste, topic, leading)

E-waste is a major threat _____the environment. Fill in the blanks with the correct preposition.

1. Wealthier countries should help poor countries with limited/shrinking resources 2. Some people claim that genetically modified foods could be the solution to staving/shrinking millions

Scientists ________that many species of plants and animals will be extinct in just a few years(roam, estimate, adopt, topic, leading, burn)

This zoo is home________more than a thousand animal species. Fill in the blanks with the correct preposition.

We must find an alternative to ______before there is nothing left to heat homes and power our cars(famine, drought, overpopulation, advancing, support, fossil fuels)

Some animals _______around the desert for days searching for food and water(roam, estimate, adopt, topic, leading, burn)