1.   The current trend towards ever higher emissions would be curbed by energy conservation and a shift away from fossil fuels to renewable energy.

2.   But it said higher emissions in earlier decades would require lower ones later.

3.   Higher energy use means higher emissions of carbon dioxide and other heat-trapping gases, which scientists say are heating up the atmosphere and contributing to climate change.

4.   In that case, he said, higher emissions in the earlier decades would cause some measure of climate change.

5.   Rich countries have far higher per capita emissions and a greater share of historical culpability for climate change.

6.   The Clinton administration attributes the shortfall mainly to higher emissions brought about by unexpectedly strong economic growth and reduced energy prices.

7.   The next month, the state inspected it and found higher emissions than were allowed.

8.   Worn spark plugs do not burn fuel efficiently, causing incomplete combustion, which means higher emissions from the tailpipe.