Grammar in Focus (Modules 1-5) Complete with the correct form of the word in brackets,

Grammar in Focus (Modules 1-5)
Complete with the correct form of the word in brackets, fill in the gaps or choose the correct word.
'Carbon neutral is the word which 1)
dioxide. Carbon dioxide is a greenhouse gas and one of the 2).
EIL
RIBEIR
Scientists 3).
decades. In fact, a paper 5)
Carbon Neutral: Why is it Important?
(give) to a person or business that produces zero carbon
(big) contributors to global warming.
(record) rising carbon dioxide levels in the atmosphere 4)
(publish) in the 18th century discussing concerns about this.
Unless the production of greenhouse gases is brought under control 6)
governments, we
... (not stop) global warming or prevent the ice caps from 8)
(melt). Those
who are carbon neutral are not solving the problem, but at least they are not adding to it 9).
(they). But one thing is sure: we 10) might/must do everything to reduce carbon dioxide in the atmosphere before
7)
it's too late!​