lukewarm
She's not a climate denier, more of a lukewarmer.
Who are the lukewarmers and how should climate change researchers react to them?
This lukewarmer does not deny the physics of the greenhouse effect, but denies that the risks of climate change are large enough to justify strong and urgent action.

SMART Vocabulary: related words and phrases

Environmental issues
agroecology
air pollution
anoxia
anoxic
anti-conservation
carbon capture
dumping ground
eco-audit
eco-footprint
efficiency
energy conservation
energy security
environmental justice
environmentalism
reduce, reuse, recycleidiom
runoff
scrapyard
scrubber
sequester
sequestration