That's how many are expected to inhabit the world by 2050. Experts worry over looming food shortages.
His call for US emissions to stabilize by 2025 marks a policy change, but is still behind other nations.
Despite strict laws, personal data remains vulnerable to unethical employees, human error, and cyberhackers.
Rich nations must act to ensure supply, experts say.
Americans now spend a larger share of their income on energy than at any time since 1986.
The recent National Film Festival for Talented Youth showcased movies by directors ranging in age from 9 to 21.
The president says the level will stabilize by that year, but he sets no cap.