According to an African proverb (and the Dalai Lama), B次元官网网址淚f you think youB次元官网网址檙e too small to make a difference, try sleeping in a closed room with a mosquito.B次元官网网址� The saying implies that even when we feel insignificant and powerless, we can create a buzz. But mosquitoes and other tiny critters can literally have a huge impact.

An insect no bigger than a grain of rice, fortified by climate change, has devastated forests in British Columbia and beyond. Warmer winters have allowed the mountain pine beetle to move further north and survive and thrive in places where cold temperatures once halted their spread.

If swaths of red, dying forests werenB次元官网网址檛 enough to get us to take global warming seriously, other tiny critters might get our attention. Researchers have found that ticks, fleas and mosquitoes are moving into new territories, in part because of climate change.

ThatB次元官网网址檚 led to an uptick in diseases, according to a report by the U.S. Centers for Disease Control and Prevention. It found vector-borne diseases spread by parasitic insects and arachnids more than tripled in the U.S. over 12 years B次元官网网址� from 27,388 cases in 2004 to 96,075 in 2016. Although the report only looked at disease increases, experts say climate change is a factor. University of Toronto epidemiologist David Fisman told E&E B次元官网网址 (republished in Scientific American) that black-legged ticks carrying Lyme disease B次元官网网址� which can impair motor function and cause memory loss, even death B次元官网网址� are showing up in parts of Canada where they havenB次元官网网址檛 been seen before.

In the past, B次元官网网址淭hey just didnB次元官网网址檛 have the ability to establish local tick populations because it simply was too cold for them to complete their life cycles,B次元官网网址� Fisman said.

Because parasitic insects and arachnids have spread not just north, and because disease increases donB次元官网网址檛 always correlate exactly with increased populations, researchers say other factors besides climate change could be at play. But, as an article in The Lancet says, B次元官网网址淯nder current predictions of climate change, mosquitoes such as Aedes aegypti and Aedes albopictus are expected to increase in both distribution and ability to transmit diseases such as dengue, Zika, and yellow fever.B次元官网网址�

The Lancet article also says increasing cases of dengue and spread and intensity of cholera have been B次元官网网址渄irectly linked to climate change.B次元官网网址� Researchers at the University of Colorado Anschutz found warmer temperatures and increased rainfall provide ideal conditions for mosquitoes to breed and can also B次元官网网址渁ccelerate viral replication in mosquitoes.B次元官网网址�

Insects arenB次元官网网址檛 the only concern related to climate and disease. B次元官网网址淩ising global temperatures, disruption of seasons, and landscape changes can cause drought and famine, as well as natural disasters and rising sea levels,B次元官网网址� the article says. B次元官网网址淭he effects, and the attendant population displacement, have huge implications for infectious diseases.B次元官网网址� It points to factors that exacerbate disease spread and severity, including mass migration, overcrowded housing, unsanitary conditions, flooding, drought and undernutrition B次元官网网址� all worsened by a warming planet.

The most vulnerable are also at the most risk. A recent study by researchers at Memorial University published in Pediatrics found children bear 88 per cent of the burden of climate-related disease, which B次元官网网址渢hreatens to reverse the gains in global child health and the reductions in global child mortality made over the past 25 years.B次元官网网址� It points to insect-related diseases such as malaria and Zika, waterborne illnesses that cause diarrhea, nutritional deficiencies, and effects of heat, drought and air pollution.

A mosquito whining while youB次元官网网址檙e trying to sleep is annoying. You might want to swat it, repel it or deal with it in some other way. Parasite and disease proliferation that comes with accelerating global warming is a much bigger, collective problem that we must work together to resolve.

David Suzuki is a scientist, broadcaster, author and co-founder of the David Suzuki Foundation.

Written with contributions from David Suzuki Foundation Senior Editor Ian Hanington.