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Aerosols in the atmosphere can affect climate. Aerosols are microscopic particles suspended in the air for days to weeks. Human activities contribute to emissions of these substances, alongside natural sources like volcanoes. Unlike greenhouse gases, climate effects of aerosols vary depending on composition and location. Aerosols that reflect sunlight have a cooling effect, whereas those that absorb sunlight, like black carbon, have a warming effect by absorbing solar and infrared radiation. Based on the above passage, the following assumptions have been made: 1. Black carbon's warming effect is offset by the cooling effects of other aerosol types. 2. Human activities contribute to aerosols, making them a manageable climate factor to some extent. Which of the assumptions given above is/are correct?