when I think of all the plants and animals that were made extinct in the 20th century, I feel sad. when I think of how the people of 2200 will interact with their environment, then I feel hopeful. so relax, humans are obsolete until the population reaches 13 thousand million

internal combustion engines were a mediocre idea at the time. 150 years later we're all dead. It's the 200 years war of attrition versus Earth's oil reserves. We will succeed.