"We all have a right to question the truth
of global warming and climate change,"

You have the right to strip naked and dance
by the light of the full moon, too. Neither
your questioning, nor your naked dancing, will
change the physical fact that anthropogenic
greenhouse gas emissions are now warming our
planet.

"Furthermore there are other more likely causes
for damage or change in the environment, such
as contamination of the air and water."

CO2 and CH4, when they are currently at 600,000-year
record levels, and rising at record levels too, are
contaminants.