L&T plans to phase out 15-year-old equipment, increase biodiesel use, and adopt renewable energy. Diesel accounts for 65% of emissions from 14,000 machines. Construction contributes 85-90% of over ₹1,31,000 crore revenue in 2023-24. L&T has 500 sites, five-year carbon reduction plans to 2025-2026, a task force, an 8% diesel cut, and seeks to reduce thermal coal usage.