While western nations have dropped emissions on schedule, led by the United States, which has pushed its greenhouse gas emissions from energy back to early 1990s levels and coal back to early 1980s levels, the increasingly modern developing world have continued to produce more emissions, causing worldwide levels to rise.
There is no short cut. Emissions need to be reduced. So forget about positioning giant mirrors in space to reduce the amount of sunlight being trapped in the earth's atmosphere or seeding clouds to reduce the amount of light entering earth's atmosphere - if we can't figure out why emissions have risen but temperatures have not, tinkering with clouds is a very bad idea.