But they can also have harmful effects on marine animals.
Over all, he said, there is little solid evidence that any climate change would have harmful effects.
"Horcrux exposure can have harmful effects that grow steadily worse over time," reads the post.
The prolonged use of sleeping pills as a relief from frequent or recurring insomnia can have harmful effects.
If, however, it is regular or frequent, insomnia may have harmful effects on other systems and functions of the body.
It also needs to counteract booms and recessions domestically because the use of monetary policy may have harmful effects in other regions.
Studies on animals have suggested that it can have harmful effects on the reproductive, developmental and other systems, causing neurological problems, for example, or stimulating obesity.
Sarah Palin, the former governor of Alaska, scoffed last month at the suggestion that failing to raise the debt ceiling would have harmful effects.
Galactose has been shown to have harmful effects such as inflammation and chemical imbalances in animal studies, but evidence of their role in human health is scant.
Some nucleotide substitutions change a codon for an amino acid into a signal to terminate translation, and those mutations are likely to have harmful effects.
Long-term exposure to these pollutants can have harmful effects.
