The research conducted at UCL-TECLIM aims at understanding the functioning of the Earth system, with focus on its climate component, and the interactions between human activities and their natural environment. The current research activities concern (1) past environmental and climate changes, (2) the current state of the Earth and solar systems, (3) human-environment interactions and (4) modelling tools. The reputation of UCL-TECLIM in the area of global climate modeling is well established. The sea ice model (LIM) it has built is considered as a reference in the community of climatologists and oceanographers, and is routinely used in about 30 different countries. Members of UCL-TECLIM have also developed a hierarchy of Earth system models, one of them (LOVECLIM) being utilized worldwide.