Four scientists discuss the promises and limits of technological fixes in their field of expertise: resistent crops, global warming, malaria mosquitoes and the brain/computer interface

Imagine a future where our crops are immune to diseases, people communicate with their thoughts and we turn down earth's thermostat. Because of technology this is all within the realms of possibility. Technology makes it all possible. But are we sure this is the right answer? How will it affect our future lives? Four scientists discuss the promises and limits of technological fixes.