Big Tech companies, including Amazon, Google, Meta, and Microsoft, have increased purchases of permanent carbon credits since the launch of ChatGPT in 2022, according to data compiled for CNBC by carbon credit management platform Ceezer. The companies have committed to reaching net-zero emissions, but this goal may not be met due to the rapid development of energy and water-intensive AI. The credits can offset emissions by funding other projects that reduce emissions. Each carbon credit represents a metric ton of carbon dioxide reduced or removed from the atmosphere. Amazon declined to comment on its carbon credit strategy, while Google did not respond to requests for comment. Ben Rubin, executive director of industry coalition Carbon Business Council, said the jump in purchases reflects the UN's 2022 IPCC report, which stated that carbon removal would be needed for all pathways to limit global warming below 1.5 degrees.