.carousel-caption {
    position: relative;
    left: 0;
    top: 0;
}
.carousel-control-prev-icon,
.carousel-control-next-icon {
  height: 70px;
  width: 70px;
  outline: green;
  background-size: 100%, 100%;
  border-radius: 50%;
  border: 3px solid green;
  background-image: none;
}

.carousel-control-next-icon:after
{
  content: '>';
  font-size: 35px;
  color: green;
}

.carousel-control-prev-icon:after {
  content: '<';
  font-size: 35px;
  color: green;
}

.carousel {
  margin: 1.5rem;
}
.carousel-inner {
  height: auto;
}

.carousel-control-prev {
  margin-left: -140px;
}

.carousel-control-next {
  margin-right: -140px;
}