Any chance of limiting global warming to 1.5˚C rests on Joe Biden being elected to a second term. Voters need an accurate accounting of Biden’s climate record ahead of the November 2024 election.
If you’re in the US and want to get involved, you can volunteer or give to the Biden Victory Fund
The two-party system exists in the US because of how elections are run. In particular, most states decide who wins an election by who gets the most votes in the general election. So when you have a third party in the mix, it serves as a spoiler, tipping the election to the people that it disagrees with the most. A few examples:
Example 1: D: 10 R: 9 I: 0
The Democrat wins
Example 2: D: 9 R: 9 I: 1
Tied election, with outcome decided by a coin flip or other game of chance
Example 3: D: 8 R: 9 I: 2
The Republican wins
The model which lets you change outcomes when elections are run like this is to take over a party from the inside. That means running candidates in the primaries in safe districts, and then backing them with money and volunteer hours.