>>12121434In several easy steps:
1. Develop wormhole technology. Shouldn't be too difficult.
2. Build a pair of connected wormhole generators and place on Mars, other on Venus, and turn them on.
3. The difference in pressure will cause Venus's CO2-rich atmosphere to flow to Mars.
4. Periodically repeat until we figure out how to make Mars's new atmosphere stay in place.
5. Hit Venus with a large specifically redirected asteroid to fix it's tilt and rotation speed.
6...
7. Profit.
