When the air you breathe is made cleaner as a result of lobbying done by an interest group to which you do not belong or contribute, you are an example of

free rider

Explanation:

A free rider may be defined as a person who benefits or gains from the things without expending an effort or without paying for it. In other words, a free riders are people who utilizes goods or take advantages of others without paying for their use.

In the context, when I breathe the air which is cleaned by some other interest group to which I do not contribute or do not belong, I am an example of free rider.

question - in 1827, john walker, a druggist in a small english town, tipped a splint with sulphur, chlorate of potash, and sulphid of antimony, and rubbed it on sandpaper, and it burst into flame. the druggist had discovered the first friction-chemical match, the kind we use to-day. it is called friction-chemical because it is made by mixing certain chemicals together and rubbing them. although walker's match did not require the bottle of acid, nevertheless it was not a good one. it could be lighted only by hard rubbing, and it sputtered and threw fire in all directions. in a few years, however, phosphorus was substituted on the tip for antimony, and the change worked wonders. the match could now be lighted with very little rubbing, and it was no longer necessary to have sandpaper upon which to rub it. it would ignite when rubbed on any dry surface, and there was no longer any sputtering. this was the phosphorus match, the match with which we are so familiar. according the paragraph what was the benefit of the new phosphorus match? it burst into flame when rubbed on sandpaper. it was made by mixing chemicals. it could be ignited on any dry surface. it threw fire in all directions.

answer - matches required natural chemicals

because his fleet was much lager than the english fleet. i hope this .