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Fill in: campaign, packaging, smog, solar, energy, volunteers.

1 The local animal shelter needs more...................... to help out.
2 I'll try to recycle as much................ as possible.
3 We've changed to low-...................bulbs that use less electricity
4 Tom's..........................panels provide enough electricity for his entire house.
5 Ann had trouble breathing because of the.......................
6 My youth club has started a(n)...................to get people cycling more.