What is "membrane"?

What's a phrase that describes "to do something impulsively without thinking about the consequences"?

The underground water is _____. The local authority is trying to find the _____ in the water to identify the cause of this water _____. (contaminate)

"In the bottling process, unpleasant chemicals may <leach into> the water from the plastic bottles." What does "leach into" in this sentence mean?

"I can't buy that house." Rewrite the sentence using "afford".

Nutrients refer to specific substances, e.g.: vitamins; whereas n _ _ _ _ _ _ _ _ refers to the process of providing or obtaining the food necessary for health and growth or the study of nutrients. Its adjective form is n _ _ _ _ _ _ _ _ _.

Make 2 sentences using "risk" and "risky".

"She does exercises daily to build up her strength." What does the phrasal verb "build up" mean?

An _____ is a substance added to something in small quantities to improve or preserve it, e.g.: food _____.

Can you name some common dietary supplements?

"O _ _ _ _ _ _" means something produced without the use of chemical fertilizers, pesticides, or other artificial agents.

"We need to follow the safety and health regulations." What is a synonym of the word "regulation"?

What is this called? It's solid waste from animals (esp. horses) spread on the land in order to make plants grow well.