Highlights of Obama's DNC speech

ENERGY: Obama said the country could cut oil imports in half by 2020, and support more than 600,000 jobs by expanding natural gas production in the United States, and investing in alternative energy sources, clean coal, biofuels, and more energy-efficient homes and buildings. He said his administration has raised fuel standards so cars and trucks will go farther on a gallon of gas; has made the country less dependent on foreign sources of oil; and opened up millions of new acres for oil and gas exploration.

CLIMATE CHANGE: Obama said his energy plan will continue to reduce the carbon pollution that is causing global warming. "Climate change is not a hoax," Obama said. "More droughts and floods and wildfires are not a joke."

EDUCATION: Obama proposed to recruit 100,000 math and science teachers over the next 10 years and to improve early childhood education. He also wants to give up to 2 million people the opportunity to learn job skills at community college, and cut in half the growth of college tuition costs.

NATIONAL DEBT: Obama said his budget plan would cut the national debt by $4 trillion without hurting the middle class. He still wants to reach an agreement based on the principles of a bipartisan group called the Simpson-Bowles Commission that he appointed to recommend ways to fix the country's biggest fiscal problems. Obama criticized Romney for proposing to lower the debt by giving tax breaks to the wealthy. "Well, you do the math," he said. "I refuse to go along with that."

MEDICARE: Obama said he would never turn Medicare into a voucher system and would strengthen the program by reducing the cost of health care, not by asking senior citizens to pay more.