The search results provided information about two apps, Yuka and Think Dirty, that allow users to scan product barcodes and get information about the impact of food, cosmetics, and personal care products on their health. Yuka provides a rating and information about the impact of food and personal care products on health, while Think Dirty gives easy-to-understand information about products and tracks "dirty" ingredients, providing cleaner options. Additionally, the search results included Apple's Environmental Progress Report, which details the company's efforts to tackle product carbon emissions, use more recycled and renewable materials, and achieve carbon neutrality for its corporate operations. The search results did not provide specific details about the positive and negative impacts of apple as an ingredient or material. If you are inquiring about the impact of apples as a food ingredient, they are generally considered to have various health benefits due to their high fiber and vitamin content. However, if you are referring to apple as a material used in a specific context, please provide additional details for a more accurate response.