Home Headline5 In-depth Q&A: Hydrogen to solve climate change. Headline5HydrogenNews In-depth Q&A: Hydrogen to solve climate change. SOURCECARBONBRIEF.ORG 30 Nov 2020 128 Does the world need hydrogen to solve climate change? | Carbon Brief For the purposes of achieving net-zero emissions, hydrogen production will need to be switched from grey to green and blue.