are going to be presented.

cannot be set.

would have to be shown.

seem to minimize its effect.

do not reflect its dire threat.

are unacceptably high in relation to other countries.

are considerably lower than those of India and China.

have increased signifificantly over the last few decades.

are being tackled through the construction of new capacity.

need to be reduced by around 74% as soon as possible.

support and supervise them.

have prevented them.

devised a number of them.

do not approve of them.

take part in their initial plan.

unforeseeable reductions in carbon emissions.

a likely cut in carbon dioxide emissions.

the increase of carbon emissions.

reductions in gas emissions in China.

the reduction of carbon dioxide emissions.

are foreseen.

are not going to occur.

would have to be calculated.

have been compensated.

were not dealt with.

moreover.

furthermore.

since.

despite.

though.

randomly rotated images.

images for human faces.

squiggly letters and numbers.

fraudsters and their automated programs.

troublesome images.

Sites Unable to Block Fraudster Abuse.

Puzzles and Images for Machine Enhancement.

Fraudsters Wreak Havoc in Web Sites.

New Puzzles that Tell Humans from Machines.

Captchas Have Come to Save Rogue Programs.

human faces.

images easily handled by humans.

upside down digitized texts.

randomly selected images.

machine-readable texts or images.

human interpretation of troublesome text.

farming out text deciphered by humans.

digitizing mass scanning projects in archives.

human recognition of images in mass media.

improving automatic character recognition.