. Childhood leukemia has been the most consistently outcome associated with magnetic field exposure. Recent studies have also shown an association between magnetic fields and amyotrophic lateral sclerosis.

Land surfaces are heating faster than the ocean surface,‏⁶ leading to heat waves, wildfires, and the expansion of deserts.‏¹⁴ Increasing atmospheric energy and rates of evaporation are causing more intense storms and weather extremes, damaging infrastructure and agriculture.‏¹⁵

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‏⁶ "Global Annual Mean Surface Air Temperature Change". NASA. Retrieved 23 February 2020..
‏¹⁴ IPCC AR5 WG2 Technical Summary 2014, pp. 44–46; D'Odorico et al. 2013.
‏¹⁵ Campbella et al. 2016; National Research Council 2012, pp. 26–27.

In recent decades, sea ice in the Arctic Ocean has been melting faster than it re-freezes in winter.

The Intergovernmental Panel on Climate Change (IPCC) Fourth Assessment Report states that greenhouse gas forcing is predominantly responsible for the decline in Arctic sea ice extent.

The IPCC Fifth Assessment Report concluded, with high confidence, that sea ice will continue to decrease in extent, and that there is robust evidence for the downward trend in Arctic summer sea ice extent since 1979.‏⁴ It has been established that the region is at its warmest for at least 4,000 years‏⁵ and the Arctic-wide melt season has lengthened at a rate of 5 days per decade (from 1979 to 2013)