The course is giving a broad overview of the main problems associated with interaction of humans and biosphere, it discusses human impact on atmosphere, hydrosphere (both marine and fresh waters), forest resources, soils. The course covers the following issues: demographic transtion, climate change, ozone depletion, acid rain problems, depletion and pollution of water resources, environmental impacts of forestry and agriculture, threats to biodiversity. There will be also brief analysis of measures (such as international environmental agreements) aiming to prevent or combat negative impacts of humans on biosphere, and peculiarities of their implementation. In the end, concepts of ecological footprint and ecosystem services will be briefly introduced. The main aim of this introductory course is to give students understanding of the key concepts of environmental impact and associated ecological issues at different scales (global, regional and local levels), as well as overiview of remediation efforts.