The environment is a crucial issue that requires a holistic and innovative approach in solving every existing problem. STEM (Science, Technology, Engineering, and Mathematics) learning has emerged as an effective framework for integrating scientific concepts in understanding and overcoming environmental problems. This research focuses on the influence of STEM learning on elementary school students' problem-solving abilities, especially those related to environmental issues. Using experimental methods and pre-experimental designs, this research involved 48 sixth grade elementary school students as subjects. The research instruments are tests and observation sheets. The research results show that the P-value (Sig.2-tailed) 0.000/2 = 0.000 is smaller than 0.05. So H0 is rejected and H1 is accepted. Apart from that, based on the results of observations, the average value reached 54.8% or was in the sufficient category. Thus, STEM learning makes a positive contribution in developing elementary school students' problem-solving abilities, especially those related to environmental problems. The implication of this research is the need to implement STEM learning strategies in the basic education curriculum to increase students' awareness and involvement in responding to environmental challenges.