Indicate whether the following statements are True (T) or False (F). ) External effect occurs when a producer pollutes an area intentionally. 2) The solar flux is the only external energy input of the Earth's ecosystem. 3) The definition of the sustainable development delivered by the Brundtland Report in 1987 states priority of the future generation's needs over the current one's. 4) The economic growth pessimists (Malthus) have failed to consider the efficiency improvements. $) The socially optimal quantity of a commodity will be lower than the market optimum. if negative externalities are present. 6) Public goods are non-rival in consumption, therefore, they are object of degradation due to incentives for mass free riding. 7) The average interest rate plays a substantial role in decisions on non-renewable resource's exploitation. 8) Cost-based monetary evaluation methods are suitable for estimating the total economic value. 9) Environmental economics applies neo-classical economic methods and analyses to environmental issues. 10) Rebound effect means an additional efficiency gain due to imposing a Pigovian tax on a commodity