To achieve its investment objective by investing, under normal circumstances, at least 80 percent of the value of its net assets (plus the amount of any borrowings for investment purposes) in equity securities of companies that have or seek to have a positive impact on the carbon economy through their current and/or planned efforts to reduce global greenhouse gas (GHG) emissions, which, in turn, are anticipated to contribute to the overall transition to a net zero economy (Net Zero Committed Companies), all as determined by the Funds sub-adviser, Invesco Advisers, Inc. (the Sub-Adviser), through the process described below. The carbon economy refers to an economy based on low carbon energy sources with minimal GHG emissions, and net zero refers to the goal of either eliminating the production of GHG emissions or offsetting the production of GHG emissions with an equal reduction in GHG emissions. Under normal market conditions, the Fund selects its investments primarily from a universe of large and mid-capitalization companies in developed and emerging market countries. Under normal market conditions, the Fund will invest in securities of companies in at least three different countries (one of which may be the United States) and may invest up to 30 percent of its net assets in securities of companies located in emerging market countries, i.e. those that are generally in the early stages of their industrial cycles. Currently, emerging market countries include Brazil, Chile, China, Colombia, Czech Republic, Egypt, Greece, Hungary, India, Indonesia, Korea, Kuwait, Malaysia, Mexico, Peru, Philippines, Poland, Qatar, Saudi Arabia, South Africa, Taiwan, Thailand, Turkey and the United Arab Emirates. The Fund may invest in securities of companies in all economic sectors, and at times, may have substantial exposure to a particular sector.