Climate Change Impacts on Agriculture
Climate Change Impacts on
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Author : Sabuz Akaash
Climate change can make conditions better or worse for growing crops in different regions. For example, changes in temperature, rainfall, and frost-free days are leading to longer growing seasons in almost every state. A longer growing season can have both positive and negative impacts on raising food.
Top Climate Impacts on Agriculture
Climate change may affect agriculture at both local and regional scales. Key impacts are described in this section.
1. Changes in Agricultural Productivity
Climate change can make conditions better or worse for growing crops in different regions. For example, changes in temperature, rainfall, and frost-free days are leading to longer growing seasons in almost every state. A longer growing season can have both positive and negative impacts on raising food. Some farmers may be able to plant longer-maturing crops or more crop cycles altogether, while others may need to provide more irrigation over a longer, hotter growing season.
Air pollution may also damage crops, plants, and forests. For example, when plants absorb large amounts of ground-level ozone, they experience reduced photosynthesis, slower growth, and higher sensitivity to diseases.
Climate change can also increase the threat of Wildfires
major risks to farmlands, grasslands, and rangelands.
Temperature and precipitation changes will also very likely expand the occurrence and range of insects, weeds, and diseases. This could lead to a greater need for weed and pest control.
Pollination is vital to more than 100 crops grown in the United States. Warmer temperatures and changing precipitation can affect when plants bloom and
when pollinators
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such as bees and butterflies, come out. If mismatches occur between when plants flower and when pollinators emerge, pollination could decrease.
Heat and humidity can also affect the health and productivity of animals raised for meat, milk, and eggs.
2. Impacts to Soil and Water Resources
Climate change is expected to increase the frequency of heavy precipitation in the United States, which can harm crops by eroding soil and depleting soil nutrients.19
Heavy rains can also increase agricultural runoff into oceans, lakes, and streams which can harm water quality. Runoff can carry nutrients, fertilizer, and pesticides into neighboring water bodies.
When coupled with warming water temperatures brought on by climate change, runoff can lead to depleted oxygen levels in water bodies. This is known as hypoxia. Hypoxia can kill fish and shellfish. It can also affect their ability to find food and habitat, which in turn could harm the coastal societies and economies that depend on those ecosystems.
Sea level rise and storms also pose threats to coastal agricultural communities. These threats include erosion, agricultural land losses, and saltwater intrusion, which can contaminate water supplies. Climate change is expected to worsen these threats.
3. Agricultural Workers Health
Agricultural workers face several climate-related health risks. These include exposures to heat and other extreme weather, more pesticide exposure due to expanded pest presence, disease-carrying pests like mosquitos and ticks, and degraded air quality. Language barriers, lack of health care access, and other factors can compound these risks.
Environmental Justice and Equity
Many hired crop farmworker are foreign-born people from Mexico and Central America. Most hired crop farmworkers are not migrant workers; instead, they work at a single location within 75 miles of their homes. Many hired farmworkers can be more at risk of climate health threats due to social factors, such as language barriers
and health care access.
Climate change could affect food security for some households in the country. Most households are currently food secure This means that all people in the household have enough food to live active, healthy lives. In 2022, 12.8 percent (17.0 million households) were food insecure. These households faced a lack of resources that resulted in difficulty providing enough food for all their members. U.S. households with above-average food insecurity include those with an income below the poverty threshold, those headed by a single woman, and those with Black or Hispanic owners and lessees.
Climate change can also affect food security for some Indigenous peoples in Hawai'i and other U.S.-affiliated Pacific islands. Climate impacts like sea level rise and more intense storms can affect the production of crops like taro, breadfruit, and mango. These crops are often key sources of nutrition and may also have cultural and economic importance.
What We Can Do
We can reduce the impact of climate change on agriculture in many ways, including the following:
- Incorporate climate-smart farming methods. Farmers can use climate forecastingtools, plant cover crops, and take other steps to help manage climate-related production threats.
- Join AgSTAR. Livestock producers can get help in recovering methane, a potent greenhouse gas, from biogas created when manure decomposes.
- Reduce runoff. Agricultural producers can strategically apply fertilizers, keep their animals out of streams, and take more actions to reduce nutrient-laden runoff.
- Boost crop resistance. Adopt research-proven ways to reduce the impacts of climate change on crops and livestock such as reducing pesticide use and improving pollination.
- Prevent food waste. Stretch your dollar and shrink your carbon footprint by planning your shopping trips carefully and properly storing food. Donate nutritious, untouched food to food banks and those in need.
See additional actions you can take, as well as steps that companies can take, on EPA’s What You Can Do About Climate Change page.
Related Climate Indicators
Learn more about some of the key indicators of climate change related to this sector from EPA’s Climate Change Indicators:
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