In addition to the extra waste sent to landfills, or polluting our rivers and oceans, production of plastic is estimated to produce 3.4% of global greenhouse gas emissions.

https://www.oecd.org/environment/plastics/increased-plastic-leakage-and-greenhouse-gas-emissions.htm

According to Scripps Health, “One daily serving of unprocessed red meat was associated with a 13% increased risk of death from cardiovascular disease or cancer.”

https://www.scripps.org/news_items/4258-is-red-meat-bad-for-you

Cattle, sheep, goats, and buffalo provide less than 19% of the protein in the human diet, but account for 90% of greenhouse gas emissions from livestock.

If you do not want to give up meat, switching from red meat to poultry can make a big difference.
https://journals.plos.org/climate/article?id=10.1371/journal.pclm.0000010

Almost everything we buy has a carbon-footprint due to energy used in collecting raw materials, manufacturing, and transportation. Buying “pre-owned” items eliminates the pollution from a new item and prevents the second-hand item from filling our landfills. You may also help support a local charity depending upon which second-hand store you purchase from.

Food waste in homes accounts for 16% of all food produced in the US. Growing, processing, and transporting that food produces significant amounts of greenhouse gasses.

https://www.feedingamerica.org/our-work/our-approach/reduce-food-waste