Lenovo 1.5 tons CO2 emissions offset for your hardware Lenovo CO2 Offset Service supports several different initiatives which include new or extensions of existing projects, windmills, solar cells and biomass energy among others. Forestation and forest conservation are also areas we are looking into for the future. Compatible with: ThinkPad P1 Gen 4 (20Y3, 20Y4) ThinkPad X1 Extreme Gen 4 (20Y5, 20Y6) ThinkCentre M70a (11CK, 11CL, 11E2, 11E3) ThinkCentre M70t (11D9, 11DA, 11EV, 11EU) ThinkCentre M720s (10SU, 10ST) ThinkCentre M720t (10SQ, 10SR) ThinkCentre M75s (11A9, 11AA, 11AW, 11AV) ThinkCentre M75s Gen 2 (11JA, 11JB, 11JC, 11R7, 11R8, 11R9, 11RA) ThinkCentre M80s (11CV, 11CU, 11EM, 11EN) ThinkCentre M90t (11D4, 11D5, 11CY, 11D0) ThinkCentre M920t (10SG, 10SF) ThinkCentre M920z (10S6, 10S7, 10Y6) ThinkStation P520c (30BY) Please refer to the manufacturer's service description for details. Register your service pack as soon as you receive the registration notification to ensure that your notebook is eligible for service!