annuals bell-peppers blocky bulky capsaicin capsicum capsicum-annuum chili-peppers color colorful colour colourful cut cut-across flesh fleshy food fruit glossy green healthy inside juicy mild moist moisture natural-foods nightshade-family orange peppers perennials pungency red salad-food seed-pods seeds shiny sliced-open smooth-skinned snack-food Solanaceae spiciness sweet sweet-pepper tasty textures vegetable yellow angled atmospheric-humidity botanical-gardens cloud-forest conservatory conservatory-complex controlled- temperature cool-moist cooling curved curves curving dome domes energy-efficient environment flowers gardens glass glasshouse greenhouse heating high high-tech horticultural horticulture hothouse indoor-gardens light lighting mountain optimized-conditions plants regulated-climatic-conditions Singapore steel structure sustainable-building-technologies tall tallest transparent unique ventilation visibility warm-growing-environment water waterfalls windows