One of the biggest trends of the 2020s decade will likely be an unfortunate one: climate change. Indeed, this topic tops the agenda at this week's annual World Economic Forum in Switzerland, commonly called Davos, after the Alpine ski resort town in which the gathering of world leaders is held.

Evidence that the earth is warming is "unequivocal," according to scientists around the world. Increasing average global temperatures and the rising frequency and severity of droughts in some areas, however, aren't the only manifestations of climate change.

In 2018, while California was in the last official full year of its epic seven-year drought, dozens of cities across the East and Midwest set records for the wettest year on record, with most records dating back to the late 1800s. And last fall's unprecedented widespread and days-long power shutoffs in Northern California can largely be attributed to climate change, as we'll discuss further in a moment.

NASA weighs in as follows on the debate as to whether the climate change we're experiencing is mainly a cyclical phenomenon or largely due to human activities:

The current warming trend is of particular significance because most of it is extremely likely (greater than 95 percent probability) to be the result of human activity since the mid-20th century and proceeding at a rate that is unprecedented over decades to millennia.

Even if the world acts relatively rapidly, it will likely take decades to halt or significantly slow down climate change. Moreover, our climate has already changed, and some of those changes are probably irreversible. Three stocks that should get a long-term tailwind from the changing climate are water utility giant American Water Works (NYSE:AWK), leading wholesaler of swimming pool supplies Pool Corp. (NASDAQ:POOL), and backup power generator maker Generac Holdings (NYSE:GNRC).

Close-up side view of woman leaning her head back and drinking from a bottle of water with blue sky in background.

Image source: Getty Images.

Overview

Company Market Cap Dividend Yield Wall Street's Projected Annualized EPS Growth Over Next 5 Years 1-Year Stock Return 10-Year Stock Return

American Water Works

$24 billion 1.5%

8.2%

46.5% 676%

Pool Corp.

$8.8 billion 1%

17%

45.3% 1,210%
Generac $6.4 billion N/A

8%

87.1% 1,100%*

S&P 500

N/A 1.8% N/A 26.9% 266%

Data sources: Yahoo! Finance and YCharts. Data as of Jan. 21, 2020. EPS = earnings per share. *Return since Generac's February 2010 initial public offering.

American Water Works

When the mercury rises, so too does our thirst. After all, on average, the body of an adult human is about 55% to 60% water. Because it's seemingly plentiful and quite cheap, it can be easy for many of us in developed countries to forget how precious that fresh water is that's quenching our thirst and, indeed, keeping us alive. But cheap it's not going to remain, as Economics 101 tells us that as demand for any product increases and/or supply decreases -- both of which are likely to occur with fresh water as the earth continues to heat up -- the price of that product rises.

Increasing prices are a plus for water utilities, such as American Water, the largest publicly traded water and wastewater utility in the U.S. Climate change, however, isn't the company's only catalyst for growth. The fragmented U.S. water utility industry is consolidating. U.S. states have increasingly been enacting legislation that makes it a better valuation proposition for municipalities to sell their water and wastewater systems to for-profit companies, such as American Water. The company's industry-leading size and widest geographic footprint give it an advantage in acquisitions.

Three young boys and two young girls -- each with an inner tube or raft -- in various states of jumping into an in-ground swimming pool with foliage and blue sky in background.

Image source: Getty Images.

Pool Corp.

We're continuing our water theme -- but now we're frolicking in the stuff rather than drinking it. While the scene above might not look so inviting for those of you who are in the grips of a cold winter, give it another five or six months, when the dog days of summer are here. If climate change continues to make those dog days, umm, doggier -- or hotter -- it seems likely that demand for swimming pools will increase.

"Nesting" at home has been a trend for some time -- witness the rise of Netflix and the struggles of movie theaters. It makes sense that this trend will gain further traction if worldwide average temperatures continue to rise. More folks will prefer to stay at home than venture out in the heat -- and it's easier to rationalize spending money on a pool if you believe it will be used enough to justify the cost.

If these dynamics play out, Pool Corp. stands to profit, since it's the world's largest wholesaler of pool supplies.

Generac

Putting a twist on a '90s hit song by Vanessa Williams, I saved the most timely for last: Generac, the leading manufacturer of home backup generators. The company's profile was elevated in the fall in the wake of Northern California's several rounds of sweeping blackouts. Despite the increased publicity, however, the company -- and its market-crushing stock -- still seem to fly under many investors' radar.

Electric utility PG&E (NYSE:PCG) turned the power off in large swaths of the northern part of the Golden State during unusually dry and windy weather to help lessen the chances of its equipment starting additional destructive and deadly wildfires that rage out of control. These extreme weather conditions have been attributed by many experts to climate change.

Preemptive power shutoffs are likely to be the new normal in California for some time and could become adopted by utilities in other states. This dynamic will continue to benefit Generac as more folks buy backup generators for their homes. The company seems to have a good chance of exceeding Wall Street's long-term earnings growth projection, as it has a good recent record of earnings surprises to the upside.

Wrapping it up

American Water, Pool Corp., and Generac are all long-term winning stocks and should continue to perform well even if climate change comes to a halt relatively soon (which seems extremely unlikely). So you can buy them with a clear conscience: They don't "need" climate change to continue to progress in order to bring you solid returns.

Moreover, by investing in them, you're doing good by helping the businesses behind these stocks improve the quality and quantity of the products and services that they sell to consumers. And we're talking about fresh water, swimming pools, and backup power solutions -- all good to great things.