For cap and trade, the amount of carbon emissions permitted determines the price; the main difficulty is that the emission permits are often subject to political manipulation, which can lead to emissions being too high and a collapse in the carbon prices, as happened initially with the EU scheme. However, a well-designed scheme could allow organisations flexibility in how they meet targets, guarantee a cap in emissions, and offset any increased costs of energy to poor people. The cap and share proposal suggests that ==governments could share out emissions allowances equally to all their adult citizens who could elect to sell them== at the current market rate to, for example, a bank or post office, from which they would be purchased by companies introducing fossil fuels into the economy.