In 2023, the U.S. government budget appropriations for R&D in the environment were at a certain baseline value. From 2024 to 2028, forecasted expenditures show a consistent annual increase. Between 2024 and 2025, the investment increases by approximately 3.75%. From 2025 to 2026, the growth rate is about 3.53%. From 2026 to 2027, there's a rise of roughly 3.34%, and between 2027 and 2028, the increase is about 3.17%. These rates suggest a Compound Annual Growth Rate (CAGR) of approximately 3.45% over this five-year forecast period.

Future trends to watch for:

Inclusion of advanced technologies in environmental R&D, enhancing efficiency and impact.
Increased investment driven by climate change mitigation priorities.
Potential policy changes influencing funding, considering global environmental goals.