I can't understand why colonize Mars. Maybe better to spend the money on saving the Earth? The earth is still better than Mars.
This is why Tesla exists.
Tesla has a big problem. Are the batteries. Existing batteries can quickly be charged and discharged quickly. They can't compete with the internal combustion engine. All the money saved should be spent on the battery.
Second generation is comming quickly, and we can say, combustion engines can't compete with Electrical engines aceleration too. They can't compete in carbon emisions neighter
![Wink](https://bitcointalk.org/Smileys/default/wink.gif)
Forgetting the fact that somebody clever can probably build a 1kW heat pump the size of shoe box and, the electric company probably siphons current from Earth's electromagnetic field for free, batteries can't compete with gasoline in terms of energy storage.