Thousands of people joined the March for Science on Saturday in Washington, D.C., and at sister marches around the world, with many bringing colorful signs to express their thoughts on the environment.

Organizers of the March for Science said the event was not meant to be a partisan affair, but President Trump's agenda – including his proposed budget cuts to federal research and actions targeting U.S. climate change work – were among the protest issues.

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Here are just some of the many posters marchers carried on Saturday:

Daniel Blackburn, 31 of Irvine, holds this sign at the LA #ScienceMarch . He said he wasn't much of an activist until Trump was elected. pic.twitter.com/pxs4PggPSu — Javier Panzar (@jpanzar) April 22, 2017

Rainy day out here at the #marchforscience pic.twitter.com/VIP1Kw3wrq — Taylor Lorenz (@TaylorLorenz) April 22, 2017

Atmospheric scientists see worse than rain in the forecast pic.twitter.com/8hn43WfSaR — Pema Levy (@pemalevy) April 22, 2017